Lathe attachment



July 6, 1937. W..F. BISKUP 2,085,945

' LATHE ATTACHMENT Filed Feb. ll, 1955 INI/WOR Patented July 6, 1937 UNITED STATES PATENT OFFICE LATHE ATTACHMENT William F. Biskup, St. Paul, Minn. ApplicationFebruary 11, 1935, Serial No. 5,939

3 Claims.

The component parts of the attachment and its application to standard lathes are illustrated in the accompanying drawing, in which- Figure 1 is a plan of the mechanisms and belts involved and shows their application to a standard engine lathe; Fig. 2 is a' half section and elevation of the driving head; and Fig. 3, a detailed view of the countershaft clamped in position.

Similar numerals refer to similar parts l5 throughout the several views.

Referring to Fig. l the parts of the attachment and their inter-relation and use are described as'follows:

The rst mechanism, a high speed driving o head 4, rotating on an extended taper shank 2, is heldin the spindle 3, ofthe engine lathe to support and align the saine with the lathe centers. The high fspeed driving head 4, is driven by a continuous V belt from asimilar cone pulley ,25 6, on the countershaft 8, ofv the second mecha- /v/Rnism 1, which is an attachable countershaft bracket bolted to the lathe bed by a single bolt I2, (shown in Fig. 3) and aligned by the rear way I3, of the lathe bed parallel to the center line of the lathe spindle, and supported at the i'oot by the flat way 29.

The countershaft 8, is driven by a mechanically jointedflat belt 9, from thelarge cone I0, of the lathe, which in turn is driven by the lathe motor in the usual' manner by a belt, with the cone latch' out and the cone running free.

By the use of the above mechanisms in the manner described and the manipulation of the belts 5 and II, on their respective cones any standard belt driven engine lathe may be quickly converted to wood turning, and the usepf revolving cutters, classes of work which require a wide range of high speeds.

By removing the V belt and driving out the taper shank from its support 2, in the lathe spindle 3, and loosening the bolt I2, on the countershaft bracket 1,. then removing the same together with the jointed belt 9, the lathe is quickly cleared for its regular use.

Figure 2, shows in detail the construction of the driving head supported in place by means oi .the taper shank 2, in the lathe spindle 3. I4

is the main supporting ball bearing. By means of the nut I6, reacting on the outer steadying 55 bearing I5, a close adjustment of the driving head may be attained. 'Ihe felt ring I8, held by the retainer I1, protects the bearing. I9, 20, -v 2I,\22, are the stepped grooves of the cone pulley, which is extended and threaded-to receive the adapter 23, to which the shanks of cutters and 5 drivers may be held by the set screw 24. A face plate may also be used instead of the adapter for wood turning.

The construction of the countershaft bracket is shownl in Figures 1 and 3. The cone pulley 6, is driven by the countershaft 8, which in turn is drivenby pulley 21. The countershaft 8, runs in bearings housed in the bracket 1. The bracket '1, is clamped through slotted holes to the bed block 25, by bolts 21, to permit lateral displacement of the bracket 1,7t'o provide for proper belt tension.

The bed block is milled to rit the ways of the lathe and thus align the countershaft with the centerline of the lathe spindle. 20

The entire assembly is clamped to the lathe bed by means of the clamping block 26, and the bolt I2. The bed block 25, is made just wide enough to permit the lathe carriage runners 28, to clear its ends..

I claim:

l. In combination with the headstock spindle, pulley, carriage and bed of an engine lathe; a detachable driving head rotatably mounted on the lathe spindle, said driving head being provided with an adapter for interchangeably receiving the Shanks of drivers or cutters; and convenient means of applying power to said driving head, said means comprising a readily detachable countershaft with auxiliary belt connections to the lathe headstock cone pulley.

2. In combination with. the headstock spindle, pulley, carriage and bed of an engine lathe; a detachable driving head rotatably mounted ony the lathe spindle, the combination in said driving head of a cone V pulley, provided with an adapter for interchangeably receiving the shanks of drivers or cutters, and a taper shank to which .the driving head is journaled by an anti-friction Y bearing in such a manner as to bring all elements into'positive adjustment by means of a nut, said taper shank providing a detachable connection to the lathe spindle; and means of applying power to said driving head consisting 0f a detachable countershaft with auxiliary belt connections to the lathe headstock cone pulley.

3. In combination with the headstock spindle, pulley, carriage and bed of an engine lathe; a detachable -driving head rotatably mounted on the lathe spindle, said driving head provided with an adapter for interchangeably receiving the shanks of drivers or cutters and having a cone v pulley adaptable to a V beltdrive; an auxiliary countershaft, said countershaft having a cone pulley on one end with belt connections to the aforesaid driving head cone V pulley, the other end having a `single pulley with belt connections to the largest pulley of the lathe spindle, the

countershaft being journaled in a bracket consisting of two sections slot-bolted together to permit belt adjustment, the bracket having a base milled to t the lathe Ways to align the same and provided with a convenient clamp to the lathe bed.

WILLIAM F. BISKUP. 

